"Today, the GNOME Project celebrates the release of GNOME 3.6, the latest version of the popular free desktop, as well as the GNOME developer platform. GNOME 3.6 is the third major update of GNOME 3. It builds on the foundations that we have laid with the previous 3.x releases and offers a greatly enhanced experience. The exciting new features and improvements in this release include a new login experience, integrated input methods, a refresh of the message tray, support for more online accounts, improved accessibility, and many more."

Yes and I'm sure that all those new users who are coming to the Linux desktop for the first time will get right on that....

That was the point of the redesign, right? To make it easier for new users to migrate over to the GNOME desktop, this is why the developers are aping so closely iOS and Android (touchscreen) designs, out of the belief that those interfaces are something these users are already familiar with and will transition easier if those metaphors exist on Linux?

SeeM seems to have posted...

What's wrong with clicking "ON" to install few extensions from a web page?

Well maybe because like others have said it is too likely that these extensions will break because they are no longer a part of the desktop itself? Or maybe it's because these extensions are actually poor replacements for what existed in Gnome 2.0? Could be, eh?

Here's another thought for you. Maybe the problem is that in its pursuit of potential users the GNOME desktop lost many of its existing users and there is no one to explain to these potential new users who will show up Real Soon Now how to add extensions to their desktop? Maybe that's it!